Relay is mounted on top of ECM, located under glove compartment. Turn ignition off. Check for battery voltage on White wire terminal of relay. If battery voltage is present, go to next step. If battery voltage is not present, check White wire circuit between relay and battery, including fuse No. 7.
Turn ignition on. Check for battery voltage on Black/White wire terminal of relay. If battery voltage is present, go to next step. If battery voltage is not present, check Black/White wire circuit between relay and battery, including fuse No. 8.
Turn ignition off. Disconnect negative battery cable. Remove relay from main fuse box. Check for continuity between terminals "A" and "B". See Fig 1 . Continuity should not be present. If continuity exists, replace relay.
Measure resistance between terminals "C" and "D". Resistance should be 56-84 ohms. If resistance is not correct, replace relay. Apply battery voltage and ground to terminals "C" and "D". Continuity should now be present across terminals "A" and "B". If continuity is not present, replace relay.

Fig 1: Fuel Pump & Main Relay Connector Terminals

Courtesy of SUZUKI OF AMERICA CORP.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Main Relay